Lock-nut



l-F. P. KIRK.

LOCK NUT.

APPLICATION mi Nov.12, 1919.

1,378,681 Patented May 17,` 1921.

.18 f27"-Fg2 UNITED STATES FRANK P. KIRK, OF ST. ALBANS, ERMONT.

LOCK-NUT.

' specification of Letters Patent.

Patented May 17, 1921.

Application filed November 12, 1919. Serial No. 337,429.

To all lwhom t may concern:

Be it known that I, FRANK P. KIRK, a citizen of the United States of America, residing at St. Albans, in the county of Franklin and State of Vermont, have invented new and useful improvements in Lock-Nuts, ot

which the following is a specification.

rThe object of the invention is to provide a simple and eilective lock nut adapted for use in connection with bolts subject to vibration and therefore liable to loosening` movement relative to the bolt with which the same is engaged and to this end the invention consists in a construction and combination of parts of which a preferred embodiment is shown in the accompanying drawing, wherein:

Figure 1 is a side view.

F ig. 2 is a longitudinal section.

Figs. 3 and 4L are detached views of the main nut members. -V

Fig. 5 is a transverse section on the plane indicated by the line 5--5 of Fig. 1.

The main or holding nut consists of the independent relatively movable members l0 and l1 threaded in the usual `way upon a bolt l2 and provided in addition to the interior threads 13 with exterior threaded portions 14 and 15 arranged vnear the inner or adjacent ends of said members for engagement by a locking ring 16. ln applying the nut to a bolt it is preferable to adjust the members of the main nut so as to leave a slight interval between their adjacent extremities as indicated at 17, and to then ad- .just the locking ring to engage both of the main members, the thread by which engagement is made between the locking ring and the members of the nut being reversed with relation to the threads by which engagement is made between the nut members and the bolt. For example, when the engagement ot the nut with the bolt is by a right-hand member 1l, so as to insure a proper engagement of the ring with the exteriorly threaded portions ot' both main nut members.

lt is obvious moreover that said nut members and locking ring may be provided with any suitable forms of wrench seats or may have any desired exterior contour for engagement by tools to adjust said parts relative to the bolt and each other.

Since the members 10 and l1 are revei'sely threaded as regards the holding nut 16, when the two are mounted on a bolt such as the bolt l2 and their exterior portions let and l5 engaged with the locking ring, any movement of either of the members 10 or l1 will tend to advance them one way or the other along the screw l2 but thedirection in which the members would be moved because of the angle of the threads on the screw would be opposed because of the tendency of the angle or" the threads .in the ring 16 tending to move the member in the opposite direction. Prior to engaging the loclf; kring 1G with the enlarged threaded portions lll and 15 of the two members, the two latter are set to the position desired and the locking` ring` then engaged 'with the two, being rotated until the Vinwardly extending stop 13 abuts the shoulder formed by the enlarged portion 15 with the remaining portion oi'l the element 11. The device may then be subjected to all sorts of vibration without fear of the device becoming loose.

That is claimed is: s

A nut lock consisting of two internally threaded sleeves enlarged at one extremity Y and provided with threads thereon the i'everse oi the internal threads, and a locking ring threaded to engage said internal threads and provided with an inturned flange or stop at one end ior abutting engagementV with the shoulder formed at the enlarged portion oi J! l. J, one oi the said elements, both the elements andl the locking ring being provided with a wrench seat.V

In Vtestimony whereof l alii): my ture. Y

FRANK i). KIRK.

signa- 

